Printing machinery.



A. B. EVANS.

PRINTING MACHINERY.

APPLICATION FILED APR.2.1915.

Patented Feb. 6, 1917.

m M w m 6 T" WW A N m sraarns ARTHUR BURROUGHES EVANS, OF LEEDS, ENGLAND, ASSIGNQR TO GEORGE MANN AND COMPANY LIMITED, 013 LEEDS, ENGLAND.

Application filed April 2, 1915.

To all whom it may concern:

e it known that I, ARTHUR BURROUGHES EVANS, subject of the King of Great Brit ain and Ireland, and residing at Highbank House, Harehills Lane, Leeds, in the county of York, England, have invented certain new and useful Improvements in Printing achinery, of which the following is a specificatio he present invention relates to web printing machinery of the type in which the paper passes from a reel to cutting or perforating apparatus or the like in order that it may be divided into sheets, which are then carried forward to the printing devices, and is especially applicable to the machines known as all-size web printing machines.

In printing machinery in which cutting or perforating is performed, as the paper passes to the printing cylinders, considerable trouble is caused by the introduction of fluff originating from the dividing device, into the printing elements of the machine.

he present invention consists in the in-. terpositio-n of a pair or more of dusting rollers or the like between the cutting or perforating members and the means for feeding the sheets to the printing cylinders.

The invention further consists in inter posing between the cutting and perforating members and the tapes or tl1 e like which dusting rollers running at a peripheral speed, whichis intermediate between the peripheral speed or perforation, and the speed of the tapes or the like.

The invention further consists in the improvements in all-size web printing ma chines hereinafter described.

In carrying the invention into effect, according to one example, as applied to allsize web printing machinery, a pair or more of dusting rollers or the like are placed between the cutting or perforating members and the. tapes running at the peripheral speed of the printing cylinders which carry the forward to the printing cyl- The tapes are moving with a peripheral speed which is greater ripheral speed of the web before cutting and the dusting rollers are caused to run at a peripheral speed which is intermediate between these two speeds; and it will be seen that by this means, a dusting action is ob- Specification of Letters Patent.

of the web before cutting Patented Feb. 6, 1191?.

Serial No. 18,859.

tained in a forward direction for the front edge of the web, and in a backward direction for the tail end of the sheet while the side edges in the case of one or more longitudinal cuttings of the web are dusted in the forward direction toward the front edge of the sheet, and in the backward direction toward the rear edge.

neferring to the accompanying drawing, which is a diagrammatic elevation of a por-- tion of an all-size web printing machine constructed in accordance with one form of the invention, the web a passes in the direction of the arrow between the nipping rollers 7) 5' which are constrained to rotate at the proper speed by a chain of gearing (not shown), deriving its motion from one of the principal running parts of the machine. From the nipping rollers b 6 the web passes between two cutters c 0 which may be of the type described in the specification of Let ters Patent N o. 8467 of 1914. After passing the line of operation of the cutters c c, the paper is guided by smoothers (Z or the like so as to pass between two dusting rollers e e which serve the main object of this invention.

In the example illustrated, additional dusting rollers 7, g, h and i are provided, of which the roller 7 bears against the roller is, while the rollers g, It and z' bear against the roller Z and act as guides for the web in passing around the roller Z, and in this manner serve a secondary object.

Around the rollers 70, Z, m, n, 0, is passed a set of tapes or the like 29, and around the roller r, s, is passed a second set of tapes or the like If. The two sets of tapes take charge of each cut sheet at the moment when the out has taken place and when the front edge of the cut web is approximately on the line of centers of the rollers m, 1", which rollers are adjustable longitudinally in the direction of the tapes in accordance with the required length of the sheet to be cut. Both sets of tapes are deflected in passing over the rollers m, r, in the usual manner for this purpose.

As is also usual, the ratio of the gearing driving the nipping rollers 15 I) should be altered according to the length of sheet re quired.

As it is usual for the peripheral speed of the tapes to be the same as that of the first pair of printing cylinders u, o, and as it is also usual that the largest sheet which can be printed at any one time should have a less length than the circumference of one of the printing cylinders 11, or o, the speed of the web and therefore the peripheral speed of the nipping rollers b b is in all cases less than the peripheral speed of the cut sheets when they are taken charge of by the tapes p, t.

The roller Z is driven positively by gearing or otherwise in a known manner so as to impart the customary speed to the tapes.

The dusting rollers e, c, f, g, h and i are covered with felt or other suitable material for the purpose of dusting the paper. The dusting roller e is driven by a chain w and sprockets m, y, deriving its motion from the roller Z. The dusting rollers f, g, h and 2' are driven by a chain a passing over sprockets 1, 2, 3, 4:, 5, 6, 7, 8, 9 and m, the motion being derived from the dusting roller e. The proportions of the sprockets are so arrange that the peripheral speed of the dusting rollers is less than the peripheral speed of the tapes 3?, t and more than the peripheral speed of the web a passing between the rollers 72 b. In this manner a dusting action is obtained in a forward direction for the front edge of the web which is running slower than the dusting rollers as it passes these rollers, and in a ackward direction for the tail edge of the sheet which is running faster than the dusting Copies of this patent may be obtained for five cents each, by addressing the rollers, while the side edges in the case of one or more longitudinal cuttings of the web are dusted in the forward direction toward the front edge of the web and in the backward direction toward the tail edge of the sheet.

Any known suction device or the like may be utilized to gather up any fluff or dust so separated from the paper.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is .In all-size web printing machinery means for feeding the web, means for separating the sheets, printing cylinders, means for carrying the sheets when separated to said printing cylinders, said means for feeding the web and said means for carrying the sheets running at different speeds, and dusting rollers interposed between said sheet separating means and said means for carrying the sheets, said rollers running at a peripheral speed intermediate between the peripheral speed of said web feeding means and the peripheral speed of said sheet carrying means. I

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR BURROUGHES EVANS.

Witnesses:

S. CHOWDER, J. SANNDERSON.

Commissioner of Patents.

Washington, D. 0. 

